The Shield Arms S15 Magazine Extension adds 2 rounds to your S15 magazine. Shield Arm’s unique, easy access floor plate design allows you to quickly access the spring and follower without having to remove the extension from the magazine body.
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Monadnock Firearms is your online destination for firearms, ammunition, and tactical gear—shipped nationwide. Established in 2017 and based in Fitzwilliam, NH, we combine expert service with a seamless eCommerce experience. Proud supporters of Gun Owners of America (GOA) and defenders of the Second Amendment.
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